[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP0329193A1 - Lagerbau insbesondere Axiallager - Google Patents

Lagerbau insbesondere Axiallager Download PDF

Info

Publication number
EP0329193A1
EP0329193A1 EP89104418A EP89104418A EP0329193A1 EP 0329193 A1 EP0329193 A1 EP 0329193A1 EP 89104418 A EP89104418 A EP 89104418A EP 89104418 A EP89104418 A EP 89104418A EP 0329193 A1 EP0329193 A1 EP 0329193A1
Authority
EP
European Patent Office
Prior art keywords
thrust
oil
bearing
liner
pads
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP89104418A
Other languages
English (en)
French (fr)
Inventor
Hooshang Heshmat
Paul T. Gorski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Reliance Electric Co
Original Assignee
Reliance Electric Industrial Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reliance Electric Industrial Co filed Critical Reliance Electric Industrial Co
Priority to EP89104418A priority Critical patent/EP0329193A1/de
Publication of EP0329193A1 publication Critical patent/EP0329193A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/1065—Grooves on a bearing surface for distributing or collecting the liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
    • F16N7/14—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated the lubricant being conveyed from the reservoir by mechanical means
    • F16N7/16—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated the lubricant being conveyed from the reservoir by mechanical means the oil being carried up by a lifting device
    • F16N7/20—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated the lubricant being conveyed from the reservoir by mechanical means the oil being carried up by a lifting device with one or more members moving around the shaft to be lubricated
    • F16N7/22—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated the lubricant being conveyed from the reservoir by mechanical means the oil being carried up by a lifting device with one or more members moving around the shaft to be lubricated shaped as rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • F16C17/047—Sliding-contact bearings for exclusively rotary movement for axial load only with fixed wedges to generate hydrodynamic pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load

Definitions

  • the present invention relates to an improved bearing assembly.
  • Bearings to which this invention relate are capable of attaining high load capabilities while maintaining low power losses, surprisingly for both flooded and starved conditions.
  • Hydrodynamic bearings in the form of pillow blocks have been used for at least a hundred years and still remain in wide use as lubricated bearing systems for general applications. Initially, such bearings were utilized for relatively low-speed operations at moderate radial and thrust loads. More recently, however, the range of use of such bearings has been extended due to the introduction of new lubricants, improvements in oil delivery systems, overall improvements to bearing efficiency, and the like.
  • Hydrodynamic bearings depend on positive pressure generation of an oil film for successful operation. In considering proper bearing operation, many factors come into play such as film thickness, lubricant temperature, operational speeds, load, and the like.
  • bearing operations may vary considerably under different operating conditions such as the parameters noted above, and a bearing designed for one particular set of operating conditions may not perform effectively for a different set of conditions.
  • differences have led manufacturers generally to design separate bearing assemblies for specific operational parameters.
  • increases not only the expense of an individual bearing assembly, but also requires the manufacturer to maintain significant inventories to meet the needs for each separate application.
  • a bearing should desirably be capable of operation at maximum load capabilities with minimum power losses under both flooded and starved lubricant conditions.
  • the bearing system according to the present invention approaches the aforementioned optimized bearing operation surprisingly effectively.
  • the present bearings have the ability to carry both radial and thrust loads at reduced power losses under both fluid film starved and flooded conditions.
  • the bearing system of the present invention may be presented in a self-contained unit that requires very little maintenance, and in the same form can utilize an external source of lubricant and/or an internal circulating lubricant system.
  • An object of the present invention is to provide an improved bearing assembly that performs effectively under both starved and flooded lubricant conditions, e.g. is capable of carrying radial and thrust loads while operating at high load capabilities and low power losses for both flooded and starved conditions.
  • Desirable features of the bearing assembly are that it may be self-contained, require little maintenance and may operate in the same form under both external or internal lubricant supply arrangements.
  • An improved bearing assembly according to the present invention can be modular in concept such that the assembly may serve as a simple journal bearing, a combination journal-thrust bearing, or a simple thrust bearing.
  • Another object of the present invention is to provide improved thrust bearings that operate under starved or flooded lubricant conditions with less power loss than conventional thrust bearings.
  • An improved bearing assembly comprises a housing which defines a shaft receiving opening therethrough; and a liner is received in the housing and defines a shaft receiving bore opening therethrough and an enlarged annulus at opposite ends of said bore opening, the liner further defining at least one lubricant delivery groove adjacent the bore opening and extending axially therealong, said lubricant delivery groove having restrictor means at opposite ends of same, and the bore opening having a length to diameter ratio of from about 0.87 to about 0.92.
  • a thrust bearing may also be secured to opposite sides of said liner.
  • the thrust bearings have a shaft receiving bore opening therethrough concentric with the liner bore opening and include a plurality of thrust pads located in a thrust surface around the bore opening.
  • the thrust pads have radially extending lubricant grooves or passageways located therebetween, and with oil bleeders or throttles at outer ends of same.
  • Two or more lubricant delivery grooves are preferably located in the liner bore opening, along opposite sides of same, and are preferably provided with openings therein for communication with an external source of lubricant which may be supplied therethrough for lubrication of the bearing.
  • an internal lubricant delivery system one or more oil rings or the like may be received about the liner to rotate with rotation of a shaft received therethrough and with a portion of the ring passing through a lubricant reservoir where lubricant is removed therefrom and is transported to the rotating shaft.
  • the oil ring is present with supplemental lubricant feed from an external source, if required.
  • the oil ring system serves as an emergency back-up system in the event of failure of the external system.
  • a bearing assembly according to the present invention may include a journal bearing only, a journal bearing and thrust bearings, thrust bearings only or thrust bearings in combination with roller bearings or the like.
  • Thrust bearings utilizable with the assembly of the present invention are secured to opposite ends of the bearing liner and define a shaft bore opening therethrough, concentric with the bore opening through the liner.
  • a plurality of thrust pads are provided around the bore opening of the thrust bearing and extend radially outwardly therefrom. Each of the thrust pads is provided with a suitable configuration for receipt and subsequent delivery of lubricant to a thrust runner employed in conjunction therewith.
  • the thrust pads may be scalloped at opposite ends defining a compound taper with a lubricant groove located along a lower surface of adjoining scalloped areas and with a lubricant bleeder being located between said groove and an outer periphery of the thrust surface of the bearing.
  • the thrust pads include a flat land area and a tapered area with radial oil grooves located between thrust pads.
  • a bearing assembly according to the present invention is capable of maintaining unexpectedly high thrust and radial loads with minimal power loss, surprisingly under both flooded and starved lubricant conditions, and thus is capable of achieving higher rotational speeds.
  • journal bearing liner Important characteristics for the journal bearing liner include axial length of the bore, the length of the axial oil groove, location of oil feeding holes inside the axial oil groove, width and shape of the axial oil groove, under­cutting of the upper liner bore in a slot area for receipt of oil rings, and dams located on the split surface of the liner at the entrance to the axial oil groove.
  • the thrust face of a liner so equipped is also important insofar as enhancement of thrust bearing characteristics under the overall load conditions.
  • Features deemed to be of importance for the thrust bearings are the number of pads per thrust surface, shape of the pads, slope angle of the pads, location of the pads on the thrust surface, a separating shroud between the pads and the exterior of the bearing, and a circumferential groove delivering oil from the journal bearing to the thrust surface pads.
  • modular design of the bearing assembly according to the present invention accommodates both thrust units and expansion bearings while as noted below, optimized geometry of the bore and thrust surfaces permit operation with minimum power losses for both flooded and starved lubricant conditions for ring type and/or external lubricant circulation systems. Still further, symmetrical configuration of the thrust pads for one embodiment of the thrust bearing permits bi­directional bearing operation while a large number of pads per thrust surface leaves a substantial flat area on the thrust surface, contributing to an increase in total lead capacity.
  • Dams may also be provided, located on the split surface of the liner, at the entrance to the axial oil groove which restrict the flow of oil and direct oil into the axial oil groove. Moreover, circumferential undercutting of the upper liner portion bore in a slot area allows penetration of the oil into the clearance gap and protects from oil losses.
  • FIGS 1 and 2 illustrate one embodiment of an overall bearing assembly according to the present invention, arranged for use as a free bearing, i.e. one not intended to handle thrust loads.
  • a pedestal housing generally 10 is provided that serves as a general enclosure for the elements of the overall assembly and defines an opening 11 therethrough for supporting receipt of a rotatable shaft S as shown in phantom.
  • An upper housing portion 8 and a lower housing portion 9 are interconnectable to provide housing 10 with stiffness in a radial direction from a bore opening 18 located through housing 10 for receipt of shaft S.
  • Housing 10 defines an oil reservoir 12 in lower housing portion 9 to preferably permit an oil ring utilized therewith to be submerged in oil at a level of about 15 percent of the diameter of the oil ring.
  • a liner, generally 30 is received within housing 10, being properly located and maintained by a plurality of liner mounts 14, 15 that are defined by an inside of housing portions 8 and 9, respectively, above and below liner 30.
  • a space 17 is defined adjacent liner 30 on opposite sides of same (only one shown) for receipt of a thrust runner 80 (indicated in phantom) when the bearing assembly is to be employed as a fixed bearing, and as described in more detail hereinafter.
  • a sealing ring 16 is also provided on opposite sides of housing 10 within opening 11 and defines shaft receiving bore opening 18 therethrough.
  • Sealing ring 16 in conjunction with appropriate seals thus basically encloses housing 10 and thus the bearing assembly by inclusion of proper seals at relevant locations. Moreover, as generally illustrated but not described, housing 10 is also provided with conventional means for mounting same, ports for the addition of lubricant, means to facilitate transfer or lifting of the assembly and the like.
  • Liner 30 as illustrated in Figure 3 includes an upper liner portion 30A and a lower liner portion 30B which are interconnected to define the overall liner structure. Unless the individual liner portions 30A, 30B are necessary for description of a particular feature, reference will be made hereinafter only to liner 30.
  • Liner 30 defines a shaft receiving bore opening 32 with an enlarged annulus 33 at opposite ends of same and with a journal bearing surface 34 received therein.
  • Liner 30 further defines at least one, and preferably two or more, axial oil grooves 35 that extend along bore opening 32 with a dam or restrictor means 36 located at opposite ends of same, defining a restricted orifice 37 thereat.
  • Oil grooves 35 also preferably define a pair of openings 38 adjacent opposite ends of same for supply of oil into groove 35 from an external oil circulation system.
  • Upper liner portion 30A defines at least one groove 40 therein for receipt of an oil ring 50 (see Figure 1). Two such grooves are shown in Figure 3 with undercut areas 41 extending along opposite sides of same.
  • oil ring 50 is received within groove 40 and rests atop a shaft S extending through bore opening 32.
  • a lower portion of ring 50 resides within oil reservoir 12 preferably with about 15 percent of its diameter submerged in oil.
  • ring 50 rotates therewith, lifting oil from reservoir 12 and depositing same atop shaft S. Oil from shaft S then optimally forms a lubricating film for proper lubrication between shaft S and bearing assembly 10.
  • oil ring bearing lubricant systems do not supply the total lubricant requirements for full film lubrication, whereby with any oil ring system, a degree of lubricant starvation exists. While improvement may be achieved by particular design of an oil ring to enhance oil delivery, further improvement may be realized by use of an axial oil groove 35 as mentioned above. With an oil ring 50 delivering oil to shaft S, the undercut areas 41 adjacent grooves 40 aid in directing oil from ring 50 into axial oil groove 35. Normally an oil film around a rotating shaft tends to diminish in thickness from a primary point of formation outwardly towards opposite ends of same. It is therefore highly desirable to attempt to maintain a uniform thickness across the entire width of the film.
  • Oil groove 35 with its restricted orifice 37 assists in maintaining a ready supply of oil across the intended film width, as opposed to conventional structures, whereby an improved film results.
  • Such construction further improves the supply of oil to a thrust bearing, particularly where additional oil is supplied to groove 35 through openings 38.
  • a general flow of oil from groove 35 and restricted orifice 37 is indicated by the arrows in Figure 3.
  • angle ⁇ is preferably about 30° while angle ⁇ ′ is preferably about 20°.
  • a thrust bearing 60 (see Figure 4) is secured to opposite sides of liner 30.
  • a thrust runner 80 illustrated in phantom in Figures 1 and 3 is located adjacent bearing 60 secured to shaft S within space 17, thus affording a thrust load capability for the bearing assembly.
  • a thrust bearing generally 60 may be provided with the bearing assembly of the present invention.
  • Thrust bearing 60 is located on a base 61 defining a shaft receiving bore opening 62 therethrough.
  • annular oil groove 63 Located about bore opening is an annular oil groove 63.
  • thrust pads 64 which include a flat land portion 65 and composite tapered or scalloped portions 66 at opposite ends of same.
  • a thrust pad 64 includes the area between lines X, X, thus incorporating two scalloped areas 66.
  • Scalloped areas 66 of adjacent thrust pads 64 have a radially extending oil groove 67 therebetween that communicates with an oil bleeder 68 at an outer end of same.
  • Radial grooves 67 and oil bleeder 68 extend from annular oil groove 63 through bearing surface 60.
  • oil is supplied to axial oil groove 35 of liner 30 via one or more oil rings 50 or oil rings 50 and an external oil circulation system (not shown) that is in communication with axial groove oil inlet feeder openings 38. Oil then escapes groove 35, forming an oil film on shaft S for lubrication of same.
  • thrust bearings 60 As shaft S rotates, oil is provided to thrust bearings 60, if present, by passing from orifices 37 into annular groove 63 about pore opening 62 and then into thrust pad scalloped areas 66 and oil grooves 67. With a thrust runner 80 adjacent thrust bearing 60, lubricant located in radial grooves 67, feeds scalloped areas 66 and is generally confined therein for improved bearing lubrication. In fact, excess oil may escape from thrust pads 64 only through bleeders 68 after which it returns to reservoir 12 of housing 10. Composite tapered portions 66 of thrust pads 64 are symmetrical, leading to reduced costs of production, and also a capability of bidirectional rotational operation.
  • a most preferred embodiment of thrust bearing 60 may be defined according to the following characteristics as best described in Figures 3, 7, and 8.
  • Scalloped areas 66 as mentioned above include a compound taper in both radial and circumferential directions.
  • the dimension S represents the distance between an inner radius of scalloped areas 66 and the central point of location of a cutting tool used to produce areas 66.
  • the distance S may, in fact, be a positive number (in a direction outwardly of area 66) or a negative number in an opposite direction.
  • the value of S ranges from about 0.03 to about -0.04 inch (0.76 to -1.02 mm).
  • Figure 7 Also illustrated in Figure 7 is a dimension LK indicative of the length of oil bleeder 68 which preferably ranges from about 0.05 to about 0.10 inch (1.27 to 2.54 mm).
  • Figure 8 illustrates the angle alpha associated with scalloped areas 66 as well as the depth XK of scalloped area 66 down to the top of radial grooves 67. Such is measured along a line Ac coincident with a deepest portion of scalloped areas 66.
  • angle alpha should be about 0.5 degrees
  • XK should range from about 0.005 to about 0.010 inch (0.13 to 0.25 mm).
  • a further important characteristic of bearing 60 is the ratio of the radial length of the thrust surface (L) to the length of an arcuate line B extending across the middle of the thrust pad.
  • L/B ranges from about 0.65 to about 1.04.
  • the thrust bearing characteristics noted above are most preferred characteristics for specific bearings having a number of thrust pads ranging from about 8 to about 12.
  • FIG. 9 A further embodiment of a thrust bearing arrangement is illustrated in Figures 9, 10, 11 and 12.
  • a bearing liner 150 is illustrated which is of like general construction and has the same preferred characteristics as liner 30 of Figure 3 except for a plurality of lubricant ports generally 155, received around opposite sides of same.
  • Lubricant ports 155 include a first circumferentail leg 156 that communicates with a groove 151 extending around the periphery of liner 150 and an axially extending leg 157 that extends into communication with a thrust bearing generally 160.
  • Lubricant grooves 151 may also communicate with oil delivery openings 38 of axial oil groove 135.
  • thrust bearing 160 is located on a base 161 and has a plurality of thrust pads 165 located around an inner annular oil groove 164, extending radially outwardly therefrom.
  • Each thrust pad 165 includes a flat land portion 166 and a tapered land portion 167.
  • a radially extending oil groove 168 is located between thrust pads 165 and extends from annular groove 164 to an oil bleeder 169 which terminates at an outer annular oil groove 170.
  • Radial oil grooves 168 also define an oil supply opening 167′ in a bottom of same, (See Figure 11) which communicate with axial legs 157 of the oil delivery ports 155 whereby oil may be positively supplied to thrust bearing 160.
  • Liner 150 and thrust bearings 160 are more precise than the liner-thrust bearing arrangement of Figures 3 and 4, and are capable of carrying more thrust load.
  • the liner-thrust bearing arrangement of Figures 9, 10, 11 and 12 are unidirectional bearings intended for premium performance situations, though reverse rotation is possible with lesser performance.
  • Thrust bearing 160 also possesses characteristics which are preferably controlled within certain limits for improved bearing operations under both starved and flooded conditions.
  • Figures 11 and 12 illustrate such characteristics.
  • the ratio of the radial length L of the thrust bearing 160 to the radius R3 measured from a central point of the bearing to an outer edge of the thrust surface should range from about 0.253 to about 0.325.
  • the base angle B of the thrust pads 165 is preferably about 27 degrees.
  • B represents the circumferential distance at about the middle of the thrust pad determined by the formula where R3 is described above and where R2 is the radius of the inner circumference of the thrust surface.
  • the ratio of the radial length L of the thrust pad to the circumferential length B of the pad preferably ranges from about 0.61 to about 1 and most preferably is approximately 0.8.
  • the ratio of the circumferential length of the tapered portion B1 of pad 165 to the total length B of pad 165 preferably ranges from about 0.72 to about 0.75.
  • the ratio L/B as defined with respect to thrust bearing 60 preferably ranges from about 0.66 to about 0.80 for thrust bearing 160.
  • the ratio of the distance between the thrust bearing 160 and the thrust runner 180 at the flat land 166 (h1) to the deepest tapered portion 167 (h2) should be about 2.45.
  • h1 may range from 0.0007 to 0.0015 inch (0.018 to 0.038 mm).
  • test bearing assemblies were mounted on a shaft flexibly coupled to a 100 horsepower (74.5 KW) vari-drive motor. One of the bearing assemblies included a thrust face while the other was a free bearing. The load was applied via a hydrostatic bearing between the journal bearings.
  • the test bearings were also constructed for oil ring and external lubrication. External oil supply was provided via the holes described herein in the axial oil grooves. Bearing characteristics as identified herein, were varied to ascertain the ranges that were operable with minimum power losses under both starved and flooded conditions. Appropriate pressure taps, thermocouples and eccentric probes were installed. Lubricant used was SAE 10, SAE 20 and SAE 30 oil. The testing indicated that the characteristics and ranges set forth hereinbefore yielded optimum and unexpectedly good performance surprisingly under all lubricant conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Sliding-Contact Bearings (AREA)
EP89104418A 1985-10-22 1986-10-22 Lagerbau insbesondere Axiallager Withdrawn EP0329193A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP89104418A EP0329193A1 (de) 1985-10-22 1986-10-22 Lagerbau insbesondere Axiallager

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US79018885A 1985-10-22 1985-10-22
US790188 1985-10-22
EP89104418A EP0329193A1 (de) 1985-10-22 1986-10-22 Lagerbau insbesondere Axiallager

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP86308211.1 Division 1986-10-22

Publications (1)

Publication Number Publication Date
EP0329193A1 true EP0329193A1 (de) 1989-08-23

Family

ID=26119954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89104418A Withdrawn EP0329193A1 (de) 1985-10-22 1986-10-22 Lagerbau insbesondere Axiallager

Country Status (1)

Country Link
EP (1) EP0329193A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0887516A2 (de) * 1997-06-26 1998-12-30 Ishikawajima-Harima Heavy Industries Co., Ltd. Schublager für einen Turbolader
WO2001081781A1 (en) * 1998-07-30 2001-11-01 Westinghouse Electric Corporation Journal bearing with oil supply groove vented in a path perpendicular to the leading edge of a bearing shoe
EP2163731A1 (de) * 2008-09-11 2010-03-17 Honeywell International Inc. Hochleistungsaxiallager
EP3091242A1 (de) * 2015-05-08 2016-11-09 Siemens Aktiengesellschaft Gleitlager mit schmiernut
WO2022040714A1 (de) * 2020-08-28 2022-03-03 Miba Gleitlager Austria Gmbh Hydrodynamisches gleitlager
WO2024104528A1 (de) * 2022-11-15 2024-05-23 Ihi Charging Systems International Gmbh Axiallager zur lagerung einer rotierbaren welle und abgasturbolader mit einem axiallager

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1599665A (de) * 1964-04-20 1970-07-20
US3625576A (en) * 1970-04-15 1971-12-07 Carrier Corp Bearing and sealing structure for high-speed shafts
DE2900363A1 (de) * 1979-01-04 1980-07-17 Inst Cercetari Stiintifice Hydrostatisches radial-axial-lager, insbesondere fuer werkzeugmaschinenspindeln
DE3025876A1 (de) * 1979-07-13 1981-02-05 Hitachi Ltd Keilflaechen-drucklager
DE3140017A1 (de) * 1981-10-08 1983-04-28 Flender A F Gmbh Co Kg Axiale hydrodynamische gleitlagerung
EP0158242A2 (de) * 1984-04-09 1985-10-16 Arcomac S.A. Radialgleitlager

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1599665A (de) * 1964-04-20 1970-07-20
US3625576A (en) * 1970-04-15 1971-12-07 Carrier Corp Bearing and sealing structure for high-speed shafts
DE2900363A1 (de) * 1979-01-04 1980-07-17 Inst Cercetari Stiintifice Hydrostatisches radial-axial-lager, insbesondere fuer werkzeugmaschinenspindeln
DE3025876A1 (de) * 1979-07-13 1981-02-05 Hitachi Ltd Keilflaechen-drucklager
DE3140017A1 (de) * 1981-10-08 1983-04-28 Flender A F Gmbh Co Kg Axiale hydrodynamische gleitlagerung
EP0158242A2 (de) * 1984-04-09 1985-10-16 Arcomac S.A. Radialgleitlager

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0887516A2 (de) * 1997-06-26 1998-12-30 Ishikawajima-Harima Heavy Industries Co., Ltd. Schublager für einen Turbolader
EP0887516A3 (de) * 1997-06-26 1999-12-08 Ishikawajima-Harima Heavy Industries Co., Ltd. Schublager für einen Turbolader
WO2001081781A1 (en) * 1998-07-30 2001-11-01 Westinghouse Electric Corporation Journal bearing with oil supply groove vented in a path perpendicular to the leading edge of a bearing shoe
EP2163731A1 (de) * 2008-09-11 2010-03-17 Honeywell International Inc. Hochleistungsaxiallager
CN101672216A (zh) * 2008-09-11 2010-03-17 霍尼韦尔国际公司 高性能推力轴承垫
US8317400B2 (en) 2008-09-11 2012-11-27 Honeywell International Inc. High performance thrust bearing pad
CN101672216B (zh) * 2008-09-11 2014-07-09 霍尼韦尔国际公司 高性能推力轴承垫
EP3091242A1 (de) * 2015-05-08 2016-11-09 Siemens Aktiengesellschaft Gleitlager mit schmiernut
WO2022040714A1 (de) * 2020-08-28 2022-03-03 Miba Gleitlager Austria Gmbh Hydrodynamisches gleitlager
AT524179A1 (de) * 2020-08-28 2022-03-15 Miba Gleitlager Austria Gmbh Hydrodynamisches Gleitlager
AT524179B1 (de) * 2020-08-28 2022-05-15 Miba Gleitlager Austria Gmbh Hydrodynamisches Gleitlager
WO2024104528A1 (de) * 2022-11-15 2024-05-23 Ihi Charging Systems International Gmbh Axiallager zur lagerung einer rotierbaren welle und abgasturbolader mit einem axiallager
WO2024104529A1 (de) * 2022-11-15 2024-05-23 Ihi Charging Systems International Gmbh Axiallager zur lagerung einer rotierbaren welle und abgasturbolader mit einem axiallager

Similar Documents

Publication Publication Date Title
US3708215A (en) Hybrid boost bearing assembly
EP0361544B1 (de) Lager
US5529399A (en) Journal-thrust bearing assembly
EP0163815B1 (de) Drucklager
US6511228B2 (en) Oil annulus to circumferentially equalize oil feed to inner race of a bearing
US5363557A (en) Method for forming a crankshaft bearing having hydrodynamic thrust flanges
US3549215A (en) Hydrostatically supported tilting pad journal bearing
US4863291A (en) Bearing assembly
US4671677A (en) Fluid seal with shaft excursion compensation
CN108302121B (zh) 一种可倾瓦滑动轴承
US20090074337A1 (en) Hybrid hydro (air) static multi-recess journal bearing
US4765760A (en) Bearing assembly
US4059318A (en) Hydrostatically supported tilting pad journal bearing improvements
EP0329193A1 (de) Lagerbau insbesondere Axiallager
EP0221727B1 (de) Lager
US3841720A (en) Thrust bearing assembly
US20040066991A1 (en) High load capacity foil thrust bearings
US20060233476A1 (en) Ball bearing
CA1261380A (en) Hydraulic slide bearing unit
CA1291193C (en) Bearing assembly
JPH0560128A (ja) 水中軸受装置
JP4089209B2 (ja) 両吸込み渦巻きポンプ
JPH06288411A (ja) スラスト軸受装置
CN2030673U (zh) 双排孔式液体动静压径向止推轴承
JPH07293556A (ja) 水中軸受装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AC Divisional application: reference to earlier application

Ref document number: 221727

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19891031

17Q First examination report despatched

Effective date: 19910708

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19950304